... .jUzzzzzzzz=+++ z + +++ Based on the operators defined in (7) and (8), the universal generating function of the branches can be obtained, and then the universal generating function of ... operations over individual universal generating function of components: , (8) () () ()()11,,imMGinmUz Uz U z qzσ===∑"m () () ()()11,,syssMGNsUz U z U z qzπ===∑"s, ... function are defined as follows [2, 3]: (3) () ()()(),1211,klMMfg gklklUzUz qqz==Ω=⋅⋅∑∑ , () () ( )()()() () () ()()1111,, , ,,,, , ,,kk nkk nUz U zU z U z Uz U zU z...